1. Division of Cardiovascular Medicine, Department of Medicine Creighton University School of Medicine Omaha Nebraska USA
2. Division of Cardiovascular Medicine Henry Ford Henry Ford Hospital Detroit Michigan USA
3. Division of Cardiology, Department of Medicine (E.A.S.) Smith Center for Outcomes Research in Cardiology Massachusetts Boston USA
4. Division of Cardiovascular Medicine, Department of Medicine Yale University School of Medicine New Haven Connecticut USA
5. Ascension Wisconsin/Columbia St. Mary's Milwaukee Wisconsin USA
6. Department of Cardiovascular Medicine Baystate Medical Center Springfield Massachusetts USA
7. Division of Cardiovascular Medicine University of Nebraska Medical Center Omaha Nebraska USA